US Patent 7550137 Method and composition for waving and straightening hair

Patent 7550137 was granted and assigned to Zotos International (Subsidiary Of Shiseido Usa) on June, 2009 by the United States Patent and Trademark Office.

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Patent Inventor Names

Andrew Savaide0

Rushi Tasker0

Wesley A. Evans0

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Patent abstract

An improved process and composition for straightening or waving hair is achieved combining ammonium bisulfite and ethanolamine sulfite in a single mixture which is maintained at a pH of between about 6.5 and 8.0. By employing the present invention, long lasting, waved or straightened hair is attained. Furthermore, using the hair waving/straightening composition and method of the present invention, the desired waving and/or straightening of hair fiber is achieved in a single step, without the need for a separate application of an oxidizing or neutralizing agent.

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